diff options
Diffstat (limited to 'lib/gitlab/utils')
-rw-r--r-- | lib/gitlab/utils/nokogiri.rb | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/lib/gitlab/utils/nokogiri.rb b/lib/gitlab/utils/nokogiri.rb new file mode 100644 index 00000000000..4b37bb7e5ea --- /dev/null +++ b/lib/gitlab/utils/nokogiri.rb @@ -0,0 +1,24 @@ +# frozen_string_literal: true + +module Gitlab + module Utils + class Nokogiri + class << self + # Use Nokogiri to convert a css selector into an xpath selector. + # Nokogiri can use css selectors with `doc.search()`. However + # for large node trees, it is _much_ slower than using xpath, + # by several orders of magnitude. + # https://gitlab.com/gitlab-org/gitlab/-/issues/329186 + def css_to_xpath(css) + xpath = ::Nokogiri::CSS.xpath_for(css) + + # Due to https://github.com/sparklemotion/nokogiri/issues/572, + # we remove the leading `//` and add `descendant-or-self::` + # in order to ensure we're searching from this node and all + # descendants. + xpath.map { |t| "descendant-or-self::#{t[2..-1]}" }.join('|') + end + end + end + end +end |